﻿//  Copyright 2016 Google Inc. All Rights Reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

using NtApiDotNet;
using System.Management.Automation;

namespace NtObjectManager.Cmdlets.Object
{
    /// <summary>
    /// <para type="synopsis">Create a new NT mailslot file object.</para>
    /// <para type="description">This cmdlet creates a new NT mailslot file object. The absolute path to the object in the NT object manager name space can be specified. 
    /// It's also possible to open the object relative to an existing object by specified the -Root parameter.</para>
    /// </summary>
    /// <example>
    ///   <code>$obj = New-NtMailslotFile \??\mailslot\abc</code>
    ///   <para>Creates a new file mailslot object with an absolute path.</para>
    /// </example>
    /// <example>
    ///   <code>$obj = New-NtMailslotFile \\.\mailslot\abc -Win32Path</code>
    ///   <para>Creates a new file mailslot object with an absolute win32 path.</para>
    /// </example>
    /// <para type="link">about_ManagingNtObjectLifetime</para>
    [Cmdlet(VerbsCommon.New, "NtMailslotFile")]
    [OutputType(typeof(NtMailslotFile))]
    public class NewNtMailslotFileCmdlet : GetNtFileCmdlet
    {
        /// <summary>
        /// <para type="description">Specify the default timeout for the mailslot in MS (-1 for no timeout)</para>
        /// </summary>
        [Parameter]
        public int DefaultTimeoutMs { get; set; }
        
        /// <summary>
        /// <para type="description">Specify the maximum message size (0 means any size)</para>
        /// </summary>
        [Parameter]
        public int MaximumMessageSize { get; set; }

        /// <summary>
        /// <para type="description">Specify the mailslot quota.</para>
        /// </summary>
        [Parameter]
        public int MailslotQuota { get; set; }

        /// <summary>
        /// Method to create an object from a set of object attributes.
        /// </summary>
        /// <param name="obj_attributes">The object attributes to create/open from.</param>
        /// <returns>The newly created object.</returns>
        protected override object CreateObject(ObjectAttributes obj_attributes)
        {
            return NtFile.CreateMailslot(obj_attributes, Access, Options, 
                MaximumMessageSize, MailslotQuota, DefaultTimeoutMs);
        }

        /// <summary>
        /// Constructor
        /// </summary>
        public NewNtMailslotFileCmdlet()
        {
            DefaultTimeoutMs = -1;
            Access = FileAccessRights.GenericRead | FileAccessRights.ReadAttributes | FileAccessRights.WriteDac;
        }
    }
}
